*pprint-gravity*

This variable was added in release 6.0. Performance testing has indicated that the overhead associated with pretty printing can be high. In order to better control this cost, no Allegro CL code sets the value of *print-pretty*. Instead, when it needs a value for *print-pretty*, Allegro CL code binds it to the value of this variable, and this variable is only set in two places: initially to nil and in the :pprint module to t.

See Speed and pretty printing in implementation.htm for more information on the pretty-printing issue.

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Created 2010.1.21.